Per D-191, the atlas is the star map extended downward — not a separate
app. AtlasPanel now owns the full Reach → system → planet → heightmap
zoom hierarchy as a single HudGroups app (implant/map).
- Add REACH_MAP as Level 0 of AtlasPanel's zoom hierarchy; renumber the
enum so higher index = deeper zoom
- Port hop-ring rendering (pan/zoom, system markers, hover/info, sector
layout) from star_map.gd into AtlasPanel methods
- Change AtlasPanel.APP_PATH from "implant/map/atlas" to "implant/map"
- main.gd: KEY_M toggles unified atlas; KEY_A binding removed
- Symmetric nav: ORBITAL_DIAGRAM back goes to REACH_MAP (not
SYSTEM_PICKER), matching the forward skip
- hud_groups.gd docstring documents the unified path and flags the
legacy starchart path as kept-for-compat (retirement tracked in #852)
star_map.gd's HudGroups registration stays live but inert — no key
binding reaches it. Full retirement follows in #852 after a sprint of
soak on the unified panel.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>